I have an 06 Mariner with a blown engine. It has the 3.0 with all wheel drive. I need to know how to tell if the engine is water pump driven by intake or exhaust cam. I have been told that these engines are not interchangeable. I do not see why this would make a difference but I am going to buy a low mileage used engine & want to make sure I get the right one. Thanks in advance for the help.

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